diff --git a/packages/editor/src/components/tools/wall/wall-tool.tsx b/packages/editor/src/components/tools/wall/wall-tool.tsx
index 7dd467be..8ec3169a 100644
--- a/packages/editor/src/components/tools/wall/wall-tool.tsx
+++ b/packages/editor/src/components/tools/wall/wall-tool.tsx
@@ -6,7 +6,7 @@ import { markToolCancelConsumed } from '../../../hooks/use-keyboard'
 import { EDITOR_LAYER } from '../../../lib/constants'
 import { sfxEmitter } from '../../../lib/sfx-bus'
 import { CursorSphere } from '../shared/cursor-sphere'
-import { createWallOnCurrentLevel, snapWallDraftPoint, type WallPlanPoint } from './wall-drafting'
+import { createWallOnCurrentLevel, snapWallDraftPoint, WALL_MIN_LENGTH, type WallPlanPoint } from './wall-drafting'
 
 const WALL_HEIGHT = 2.5
 
@@ -18,7 +18,7 @@ const updateWallPreview = (mesh: Mesh, start: Vector3, end: Vector3) => {
   const direction = new Vector3(end.x - start.x, 0, end.z - start.z)
   const length = direction.length()
 
-  if (length < 0.01) {
+  if (length < WALL_MIN_LENGTH) {
     mesh.visible = false
     return
   }
@@ -143,7 +143,7 @@ export const WallTool: React.FC = () => {
         endingPoint.current.set(snappedEnd[0], event.position[1], snappedEnd[1])
         const dx = endingPoint.current.x - startingPoint.current.x
         const dz = endingPoint.current.z - startingPoint.current.z
-        if (dx * dx + dz * dz < 0.01 * 0.01) return
+        if (dx * dx + dz * dz < WALL_MIN_LENGTH * WALL_MIN_LENGTH) return
         createWallOnCurrentLevel(
           [startingPoint.current.x, startingPoint.current.z],
           [endingPoint.current.x, endingPoint.current.z],
diff --git a/packages/editor/src/components/ui/panels/wall-panel.tsx b/packages/editor/src/components/ui/panels/wall-panel.tsx
index aa210617..26c121e2 100644
--- a/packages/editor/src/components/ui/panels/wall-panel.tsx
+++ b/packages/editor/src/components/ui/panels/wall-panel.tsx
@@ -25,6 +25,29 @@ export function WallPanel() {
     [selectedId, updateNode],
   )
 
+  // Função mágica para a Issue #191: Atualiza o comprimento via cálculo vetorial
+  const handleUpdateLength = useCallback((newLength: number) => {
+    if (!node || newLength <= 0) return
+
+    const dx = node.end[0] - node.start[0]
+    const dz = node.end[1] - node.start[1]
+    const currentLength = Math.sqrt(dx * dx + dz * dz)
+
+    if (currentLength === 0) return
+
+    // Calcula a direção (vetor unitário)
+    const dirX = dx / currentLength
+    const dirZ = dz / currentLength
+
+    // Define o novo ponto final baseado no novo comprimento
+    const newEnd: [number, number] = [
+      node.start[0] + dirX * newLength,
+      node.start[1] + dirZ * newLength
+    ]
+
+    handleUpdate({ end: newEnd })
+  }, [node, handleUpdate])
+
   const handleClose = useCallback(() => {
     setSelection({ selectedIds: [] })
   }, [setSelection])
@@ -46,6 +69,17 @@ export function WallPanel() {
       width={280}
     >
       <PanelSection title="Dimensions">
+        {/* Adicionando o controle de Length solicitado na Issue #191 */}
+        <SliderControl
+          label="Length"
+          max={20}
+          min={0.1}
+          onChange={handleUpdateLength}
+          precision={2}
+          step={0.01}
+          unit="m"
+          value={length}
+        />
         <SliderControl
           label="Height"
           max={6}
@@ -67,13 +101,6 @@ export function WallPanel() {
           value={Math.round(thickness * 1000) / 1000}
         />
       </PanelSection>
-
-      <PanelSection title="Info">
-        <div className="flex items-center justify-between px-2 py-1 text-muted-foreground text-sm">
-          <span>Length</span>
-          <span className="font-mono text-white">{length.toFixed(2)} m</span>
-        </div>
-      </PanelSection>
     </PanelWrapper>
   )
 }